440Mopar:
is a load of shhhh, Think i heard or read somewhere that driving with a red backlight in the cab in the dark reduces fatigue and stops the dazzle from oncoming vehicles. The FH has a red light setting so i tried it. Result, nothing, does it work for others or is it another myth,or is it me.
has to do with Psychology
Harry Monk:
440Mopar:
is a load of shhhh, Think i heard or read somewhere that driving with a red backlight in the cab in the dark reduces fatigue and stops the dazzle from oncoming vehicles. The FH has a red light setting so i tried it. Result, nothing, does it work for others or is it another myth,or is it meAnother member of the Rob K class- I have never tried it so I donât understand it, I donât do it so anyone who does do it is stupid.
What are you on about ,⌠looking at the time you posted it explains all.
I normally make a trip the the UK from PL at night so I have a couple of LED red ones in the overhead reading lights, I find at night when the traffic is not very heavy is where the benefit is best, long periods in darkness then something comes around the corner lights a blazing its seems less stressful on the eyes to accustom themselves to the new light level, it works for me and I have read about its use on ships and subs.
I might try it in our trucksâŚJust to see what all the fuss is about! 
tried it last night after reading this⌠not convinced to be honest. just reminded me of window shopping in amsterdam
NB12:
I wear yellow specs at night and it seems to help, just takes a bit of getting used to with traffic lights.
You should have no problem with Traffic Lights even if all the lenses are broken
Tried it and it worked seemed less glare
Wheel Nut:
Adam_Mc:
For those of you who donât know the origin or âred lightsââŚWhen the light starts to fade, your eyes have to adjust to the lack of available light to enable you to still be able to see in the dark (I wonât go into the purpose of cones and rods in your eyes)âŚfunnily enough this is called ânight visionâ and human eyes arenât too bad at it once theyâve had time to adjust to it. HoweverâŚif its almost pitch black and youâve not seen any large amounts of light for some time, and therefore have acquired your night vision, it can be ruined in an instant by a sudden input of lightâŚsuch as a torch or cab lights. Hence why youâre often dazzled by high beams, and after the car has passed, you will usually see a green/purple splodge in the middle of your visionâŚafter a while, it goes back to normal.
The whole purpose of red lights being used is because they have a different âfrequencyâ to white light in the electromagnetic/light spectrum, and if you have acquired your night vision, red light will not ruin your night vision. This is especially useful when reading a map for instanceâŚnot only that but it has another use. Red light doesnât travel as far as white light.
So if you were s soldier trekking through the woods or through fields in the pitch black after having acquired your night visionâŚyou would turn on a red light to read a map, after you turn the red light off, you wouldnât have lost your night vision AND a potential enemy wouldnât be able to see you as easily.
The whole point of red lights in trucks is so that you or your drivers mate can turn the lights on to read a map to help you navigate, and it wonât affect your night vision whilst the light is on or after you turn it off.
exactly the same reasoning is used on a ship, the lookout is staring out to the horizon and back to the ship looking for obstacles of danger, a bright light from the binnacle or the chart room would kill his vision so red is used instead, also the navigator can come out to check the compass heading and still see the steps
However just to be picky and as a side note try reading an os map with red light it makes contour lines dissapear best light to read a map from a soilders point of view is a small pinprick of white light but. I see what you mean mate
